How to make scroll bar drop with a down menu?

HTML/CSS/Javascript Drop Down Menu?

• What's the easiest way to make a drop down menu when you hover over a link? For example, I have a website. There's a navigation bar on top with links to pages. Here's a picture of what it currently looks like: http://i.imgur.com/zCHMQ.png What I want it to look like is this: http://i.imgur.com/tob6I.png I have my CSS set so that when you hover over a link, it changes the background and font color. I want to maintain that property, and have it also apply for the drop down links. Also, I've tried making a menu in the past, but I've run into three issues. 1) While not hovering over the Lessons block, the border under the word "Lessons" would appear where the border at the bottom of the menu is and there would be no border directly under it. 2) When the page loaded, the menu was there. It would only disappear after hovering over it once. 3) Even while the menu is not visible, the rest of the website would be pushed down below where the bottom of the menu would be, leaving a huge gap between the menu bar and the title of the website. The simplest drop down menu that maintains the look of my website is what I want. I'm not looking for any sliding or fading animations, just a simple pop-in, pop-out. If you could help me, I'd greatly appreciate it.

• Answer:

  for 1 and 3 use position absoute or relative(dont remember exactly) for 2 use display:none in it's default css and only on mouse over show it...and on mouse leave...hide it again